Bulb discharger info

[crazyjr]

I'm thinking about making a bulb discharger and need some info.

First: Do I need the single or dual element bulbs

second: I heard each bulb is good for 2 amps draw, Is this true?

Thanks for any info you can contribute. I know there are better methods for discharging, but my batteries are old and don't need a disgharge board till i get better batteries. Besides i'm always up for a new project and i've never made a discharger before so its my next project to learn from

thanks again